Mechanical pencil



voci. 12,1937.4 P. js. HAUTN MECHANICAL PENCIL 1%i1ed oct. 1, 1932 Y ATTORNEY wsv L ,U A P w G @ai D MA1 f s .T

.a :1.15214 .n ,$45551 s454455. 5:12541 un!!! rfefed oea lf2, mais i d Y This invention` relates'lto 4lrrieclianical'pencils and hasmorepartioularvreference lto-pencilsfof the type in which a* lead 'holderfsjfed 'longitudinally of thelpencil `by relative ,rotation of ldiier- "R5 ent'portionsothe pe'cilextlrior."

bediesfa rotatable* lead immer@ in threaded'e'hby 'mechanism operatedfrom" the Writing end of the pencihthe partsbeing arranged in such a. ay asfto afford a simplied `construction which is easily assembled andwhich has the appearance `and feel of the `usual type of mechanical pencil. 15' l"More specically stated, the" presentinvention l nallywthereinand so arrangedlthat thelwingsof `the leadholder engage the threads of a threaded `writingend of "the pencil tofj'which the slotted member isA attached,` the leadhfolderlis fed longitudinally to expel or retract thelead. The end 25 of` the slotted member at `theQend"of the pencil f l `opposite to the writing end is secured against' 1longitudinal movement in ythe :pencil insuch a way as to allow free -rotation of theslotted mem` ber, thereby holding the manually operable meman ber at the writing end in position in a simple and eiectivemanner.` j l i i WhileI one embodiment of the invention is l 1 illustrated fin theacco-mpanying drawing,` it is i. tobe understoodrthat'thisembodiment merely 3i;` serves as1 an illustration of the underlyinglprinoiples, of the invention so thatthey may be readily comprehended by those skilled n thear't, and is specific form Cdisclosed therein.` p

` L fFig, f1"is Verticalsection partlyfragmentary,

" Fig". 2`islarsection ofFig. 1 on the line 2-j-2,

45 Fig. `4 isa fragmentary end section of a modi- Wedlform. f w 1 Continuing now by `way of amore detailed de-v scription,` a rotatable feed, tube A, presenting'a e mg end of the perlen, for a reason to beindieated, -ecloses' aleadhlderindicated in its entirety by `slide therein, andghaving `an, internal boreiof `g; substantially, the lsanfte diameterfas that of the M d lvreonmoALl-PENCIL" d p, d ri,`mais,(latam,iguana;cai-`` Applicatie@ demperi, 193,2, )serial- No; 635,843"i j i n io'laineff (cruzo-18) fl., v

.1 i Comprehensivelyjjstated; *the ilinvention l 3; `gagement `with" .nlinternally "threaded ymerriber and `adapted "to be' `moved longitudinallythereof p comprehen'ds a rotatable slotted `member"which l l has a. winged lead'holder free to slide flongitudil feed tube surrounding" the; slotted member'. By4 rotating a manually rotatablememberat the not intended as limiting the inventionj to the Vr l,

writing fleadC ,u"s oy 'thatthelead may be fitted snugly ,therein 'and` frictionally retained, thereby. Thegslittedjleadholderwhich, iscleared away at the 1 writing end, will p be observed` from an p `inspection oftheudrawingjaiording ankfarrange-` 5 V ment fer `facilitatingthe'diiisertionxef,the lead y Y and yet 'affording a mgrip on the lead. The lead; holder Balsolhafs awing Dpreferably formed ftherewith,` adapted to engage the threads of an 'internallyv threaded member, `E` which `maybe `1,0

formed' in any convenientmanner, as`"for'instanc`e,

asH indicated in'my copending application S. N. 561,829,` A wingedY ejecting pin F is slidably "mounted in' the bore of the holder and has a V Ywing D' projecting through aslot D" in the l5 .lead holder for ejecting short lengths of lead 4 l which may remainY in the holderand is similar to that `described in myV copending `application for mechanical pencils above identied and needs no`v further descriptionlexcept tofmention the fact 20 `that the lower end of the slotted tube A is closed off, `as heretofore indicated, to stop the `longitu dinal movement of wingD. The threaded feed tube E terminates short of the closed portion 0f the slotted tube A, so that the `wing D may 25 disengage from thethreads and its longitudinal `movement may be arrested by` the closed end of the slotted feed tube A while the ejecting pin is still being fed; In order to rotate the feed tube A, it is soldered -or otherwise aflixed at G to a 3b tapered manually operable rotatable leady guide tip H at the Writing end ofthe pencil, the tip rbeing shouldered at J, forming a restricted open-y ing to receive and'rrnly sup'port the lower end of the slotted tube. The upper portion ofthe rotatable tip is'recessed in the body portion of the pencil and` its upper end' K abutsl against an .annularshoulder K in the body portion, so as to aiord a smooth exterior toj the pencil` and so that, the tip H `turns freely about thebody port 40 tion and rotates the slotted, feedtube attached thereto, 'the rotation of the tip causing the slotted tube to move the lead holderB spirally by engagement of` wing D `and thethreads of tube E, except when the lead holder is near the tip, as will 45 be readily understood. 'Ihe upper swaged or spun end of the slotted tube A turns freely on a spacj ing washer M freely'set on thetop of the threadedA feed tube, Which'in turn, is preferably flush `with i `-the top `of the casingfto afforda substantial foot- 5 ing for the washer, althoughthis is not essential 0 `since the washer might conform to the top of the vthreaded tube, thereby affording `space for` the casing to be carrled'upwardly beyond the end of the` slottedrtube. Y

The top of the pencil may be and preferably is, nished oil with an eraser N, carried in an eraser holding cup N', which, in turn, is supported in a suitable guide ferrule P, tting the restricted end of the casing. The casing Q, which may consist of any suitable material, has a plurality of spare lead receiving openings Q' which are accessible through suitable openings R in the washer M, in the event the washer is of the diameter indicated in the drawing. The washer openings may, however, be dispensed with in the event a washer of smaller diameter is used, as will be readily understood.

The modification shown in Fig. 4 shows a construction in which a barrel S has a restricted shouldered end S similar to the restricted end of the barrel shown in Figs. 1, 2, and 3 to receive a sleeve or ferrule Ul projecting beyond the end of the casing S to receive an eraser in a manner to be hereinafter described. The barrel S has a spiral thread V cut or otherwise formed therein to guide a winged follower carried by the slotted tube W, which in turn, is supported at its upper end by a washer X similar to the construction` shown for supporting the end of the slotted tube A shownin Figs. 1, 2, and 3. The sleeve U supports an eraser T having its lower end enclosed in a cup T', the sleeve U serving to finish off the eraser end of the casing and support the eraser, as will be readily'understood. TheV writing end of the pencil and feed mechanism is similar to that shown in Figs. 1, 2, and 3 and requires no further description.

The present application is in part, a continuation of my application Serial No. 561,829.

I claim: i

A mechanical pencil comprising a casing having an axial bore, lead feed mechanism including a slotted tube located within the bore, a tapered guide tip journalled on the lower end of the casing and secured to one end of the slotted tube. a washer having spaced peripheral openings therethrough and resting on the upper end of the casing. the upper end of the slotted tube bcing expanded over the washer and inwardly of said peripheral openings to rmly hold the tip against the casing and prevent longitudinal displacement of the slotted tube and the tip relatively to the casing, a sleeve engaged over the upper endof the easingand projecting therefrom. and an eraser cup engaged in the projected end of the sleeve immediately above theA washer, the inner wall of the casing having spare lead receiving recesses therein in spaced relation about said lead feed mechanism, the spare leads being insertabley into and `removed from the recesses through said peripheral openings in the washer uponV the removal of the eraser cup from the sleeve. Y

PAUL S. HAUTON.

Iii) 

